Eagle Chevy Small Block 350 Throttle Response Rotating Assemblies are perfect for limited modified circle track applications and give you exactly what the name says - better throttle response through the use of lightweight components. A lower reciprocating mass means that everything gets moving quicker, helping you get out of corners and accelerate down the straightaways faster. These kits include quality components including an Eagle Lightweight Forged 4340 Steel Crankshaft with 1.889" rod journals (2pc seal only), Eagle Lightweight H-Beam Rods with 7/16" ARP 8740 bolts, Premium Mahle Forged Pistons, plasma-moly file-fit rings, and high-performance Clevite or King Bearings.